There is no such thing as spending the night to increase your odds. I live 45 min from Nong Khai border, you can leave and come back 15 min later no problem.
The 2 visa exempt land entry has been there for 6-7 years approx? OP is talking about recent toughness at the border which is not a thing. And what you are describing with illegal work is unrelated to entering by land, it's a different subject which, yes, it's harder to work illegally unless you do it online.
It's a common myth that border run is getting more difficult in Thailand. What is more difficult is entering from an airport (especially BKK and Phuket), but the borders are really easy to enter from with no issue.
You don't need to worry about 1 day overstay. You won't be charged 500 baht for a 1 day overstay in Suvarnabhumi Airport. And the overstay stamp is no big deal. Those who think an overstay stamp can be a problem are clueless. In the list of all potential reason to be denied a visa or entry in Thailand, overstay stamp is very far down the list.
The fountain of all visa related knowledge is Tod Daniels, but to answer your question, the myth of denial due to overstay is an old foreigner myth that they use to fear monger and patronize younger people. It's not a thing.
Chong Chom is a very easy border to bounce from. Foreigners don't go there often so you don't wait in line ever and they don't ask any question. I can even cross that border with my dogs no question ask.